Imaging apparatus and imaging method

Abstract

An imaging apparatus includes a correction member movable within a plane orthogonal to an optical axis, a vibration detection unit configured to detect vibrations applied to the imaging apparatus, a filter configured to pass a frequency of a predetermined band of vibration signals from the vibration detection unit, a calculation unit configured to calculate a vibration correction amount based on an output from the filter, a driving control unit configured to drive the correction member by using the vibration correction amount to perform vibration correction, and an intermediate value changing unit configured to change an intermediate value of the filter unit to a predetermined value immediately before exposure.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to an imaging apparatus which has an image stabilizing function.[0003]2. Description of the Related Art[0004]An imaging apparatus typified by a still camera or a video camera has an optical image stabilizing system or an image sensor image stabilizing system available as a system for correcting vibrations such as camera shakes applied to the apparatus from the outside.[0005]These systems perform digital signal processing on a signal from a vibration detection sensor which detects a vibration degree, via an analog-to-digital (A / D) converter, calculate a vibration correction amount to execute digital-to-analog (D / A) conversion, and then drive a correction unit for image stabilizing, i.e., a shift lens or an image sensor.[0006]An angular speed sensor is often used for vibration degree detection. This angular speed sensor vibrates a vibration material such as a piezoelectric element at a consta...

AI Technical Summary

Benefits of technology

[0018]The present invention is directed to an imaging apparatus or method capable of performing appropriate image stabilization by changing an intermediate value of a digital low-pass filter which includes a delay element to a predetermined value immediately before a start of exposure to prevent an increase in a driving amount of a correction unit, in other words, to eliminate an influence of large vibrations caused by a panning operation or the like.

Problems solved by technology

Consequently, an image may not be stabilized correctly when the shift lens is near a driving limit.

As a consequence, the driving amount becomes large again within a short time.

When the intermediate value is large, the image may not be stabilized correctly because the intermediate value of the digital low-pass filter works to reduce a final output of the digital filter.

Images